[PATCH] Fix weird PCI bus numbers with pci_linkX

[John Baldwin]

On Tuesday 22 November 2005 03:43 pm, John Baldwin wrote:
> On Tuesday 22 November 2005 03:03 pm, Mathieu Prevot wrote:
> > Weird addresses disappeared. But I don't why I have invalid IRQ ...
> >
> > ...
> > ACPI APIC Table: <VIAK8  AWRDACPI>
> > ioapic0 <Version 0.3> irqs 0-23 on motherboard
> > ...
> > pcib0: <ACPI Host-PCI bridge> port 0xcf8-0xcff on acpi0
> > pci_link9: BIOS IRQ 11 for 0.16.INTA is invalid
> > pci_link9: BIOS IRQ 5 for 0.16.INTB is invalid
> > pci_link9: BIOS IRQ 10 for 0.16.INTC is invalid
> > pci_link10: BIOS IRQ 10 for 0.17.INTC is invalid
> > pci_link11: BIOS IRQ 11 for 0.18.INTA is invalid
> > ...
> > uhci0: <VIA 83C572 USB controller> port 0xd400-0xd41f irq 21 at
> > device 16.0 on pci0
>
> You are using an I/O APIC.  In your ASL, your pci link resources get
> different IRQs when using APIC than when not using APIC.  The BIOS never
> uses APIC mode, so it programs IRQs for each PCI device according to the
> non-APIC (aka PIC) mode.  The messages above mean that we found out during
> the boot that the interrupt for 0.16.INTA (PCI bus 0, device (slot) 16, pin
> A#) is routed via the pci_link9 device, and that the BIOS had set the IRQ
> for that device to 11.  However, when we switch over to APIC mode, then the
> list of valid IRQs for that link device are something like 20, 21, 22, and
> 23.  The IRQ the BIOS used (11) isn't in that list, so we ignore it and
> pick an IRQ out of the list (21 in this case).  You don't need to worry
> about these messages.  I'll see if I can't shut them up in this case (BIOS
> uses an ISA IRQ but this link device only has non-ISA IRQs).
>
> In fact, I've just whipped up a patch to shut these warnings up.  It's
> attached.

Patch got killed apparently.  You can fetch it from

http://www.FreeBSD.org/~jhb/patches/acpi_pci_link.patch

-- 
John Baldwin <jhb at FreeBSD.org>  <><  http://www.FreeBSD.org/~jhb/
"Power Users Use the Power to Serve"  =  http://www.FreeBSD.org